package com.changgou.interceptor;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.util.Enumeration;

/**
 * @Author LQQ
 * @Date 2020/3/12 9:26
 * @Version 1.0
 */

/**
 * Feign的拦截器
 */
@Component
public class FeignInterceptor implements RequestInterceptor {
    @Override
    public void apply(RequestTemplate requestTemplate) {
        //传递令牌
        RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();

        if (requestAttributes != null) {
            HttpServletRequest request = ((ServletRequestAttributes) requestAttributes).getRequest();

            if (request != null) {

                Enumeration<String> headerNames = request.getHeaderNames();

                while (headerNames.hasMoreElements()) {

                    String headerName = headerNames.nextElement();

                    if ("authorization".equals(headerName)) {
                        //Bearer jwt
                        String headerValue = request.getHeader(headerName);

                        //传递令牌

                        requestTemplate.header(headerName, headerValue);
                    }
                }
            }

        }
    }
}
